The Mini Sweeper from Picote Solutions is designed to clean and descale pipes, including removing tree roots. It grinds away debris from the inside of the pipe at 1,000 to 1,500 rpm. The aggressive tool is effective in situations where there is thick scale, rust or other waste materials that are difficult to remove. It can also be used to remove wrinkles in liners or to remove excess lining material from the pipe wall after a failed liner has been removed. It is rebuildable after the legs become dull. It is available for 2-, 3-, and 4-inch pipe sizes and is powered by the Picote Mini or Maxi Miller. 708-267-6366; www.picotesolutions.com.